package com.itheima.controller;

import com.itheima.pojo.Result;
import com.itheima.pojo.User;
import com.itheima.service.UserService;
import com.itheima.utils.JwtUtil;
import com.itheima.utils.Md5Util;
import com.itheima.utils.ThreadLocalUtil;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import lombok.extern.slf4j.Slf4j;
import org.hibernate.validator.constraints.URL;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.data.redis.core.ValueOperations;
import org.springframework.util.StringUtils;
import org.springframework.validation.annotation.Validated;
import org.springframework.web.bind.annotation.*;

import javax.validation.constraints.Pattern;
import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.TimeUnit;

/**
 * 功能：
 * 作者：大风
 * 日期：2024/10/17 10:25
 */
@Slf4j
@RestController
@Api(tags = "用户的登录注册")
@RequestMapping("/user")
@Validated
public class UserController {

    @Autowired
    private UserService userService;
    @Autowired
    private StringRedisTemplate stringRedisTemplate;

    @ApiOperation("注册接口")
    @PostMapping("/register")
    public Result register(@Pattern(regexp = "^\\S{5,16}$") String username,@Pattern(regexp = "^\\S{5,16}$") String password){
        log.info("用户注册，查询用户是否已经被注册");
        //查询用户
        User u = userService.findByUserName(username);
        if(u==null){
            //没有占用
            //注册
            log.info("用户开始注册");
            userService.register(username,password);
            log.info("注册成功");
            return Result.success();
        }else {
            //占用
            log.info("注册失败，{}","用户名已被占用");
            return Result.error("用户名已被占用");
        }
    }

    @PostMapping("/login")
    public Result<String> login(@Pattern(regexp = "^\\S{5,16}$") String username,@Pattern(regexp = "^\\S{5,16}$") String password){
        log.info("根据用户名查询用户");
        //根据用户名查询用户
        User loginUser = userService.findByUserName(username);

        //判断该用户是否存在
        if(loginUser==null){
            log.error("用户名错误");
            return Result.error("用户名错误");
        }

        //判断密码是否正确 这里在数据库中查到的密码是密文，需要将传进来的密码同样加密为密文，再进行比较
        if(Md5Util.getMD5String(password).equals(loginUser.getPassword())){
            //登录成功
            log.info("登录成功，生成jwt-token令牌");
            Map<String,Object> claims = new HashMap<>();
            claims.put("id",loginUser.getId());
            claims.put("username",loginUser.getUsername());
            String token = JwtUtil.genToken(claims);

            //把token存储到redis中，登录的时候用来和传输过来的token做进一步的验证
            ValueOperations<String, String> operations = stringRedisTemplate.opsForValue();
            operations.set(token,token,12, TimeUnit.HOURS); //在redis中的保留时间为12个小时
            return Result.success(token);
        }

        log.error("密码错误！");
        return Result.error("密码错误！");

    }

    //通过token来获取username
    @GetMapping("/userInfo")
    public Result<User> UserInfo(/*@RequestHeader(name = "Authorization") String token*/){
        //通过token来获取用户名
        /*Map<String, Object> map = JwtUtil.parseToken(token);
        String username = (String) map.get("username");*/

        //通过线程，来获取token，然后通过token获取用户名
        Map<String,Object> map = ThreadLocalUtil.get();
        String username = (String) map.get("username");
        //根据用户名查询用户
        User user = userService.findByUserName(username);
        return Result.success(user);
    }

    /**
     * 修改用户信息
     * @param user
     * @return
     */
    @PutMapping("/update")
    public Result update(@RequestBody @Validated User user){
        userService.update(user);
        return Result.success();
    }

    /**
     * 修改头像
     * @return
     */
    @PatchMapping("/updateAvatar")
    public Result updateAvatar(@RequestParam @URL String avatarUrl){
        System.out.println(avatarUrl);
        userService.updateAvatar(avatarUrl);

        return Result.success();
    }

    /**
     * 修改密码
     * @return
     */
    @PatchMapping("/updatePwd")
    public Result updatePwd(@RequestBody Map<String,String> params,@RequestHeader("Authorization") String token){
        //1.校验参数
        String oldPwd = params.get("old_pwd");
        String newPwd = params.get("new_pwd");
        String rePwd = params.get("re_pwd");

        if(!StringUtils.hasLength(oldPwd) || !StringUtils.hasLength(newPwd) || !StringUtils.hasLength(rePwd)){
            return Result.error("缺少必要的参数");
        }

        //原密码是否正确
        //调用userService根据用户名拿到原密码，再和old_pwd比对
        Map<String,Object> map = ThreadLocalUtil.get();
        String username = (String) map.get("username");
        User loginUser = userService.findByUserName(username);
        if(!loginUser.getPassword().equals(Md5Util.getMD5String(oldPwd))){
            return Result.error("原密码填写不正确");
        }

        //校验newPwd和rePwd是否一样
        if(!rePwd.equals(newPwd)){
            return Result.error("再次填写的密码不一样");
        }
        //2.调用service完成密码更新
        userService.updatePwd(newPwd);
        //密码更新后，应该删除redis中对应的token
        ValueOperations<String, String> operations = stringRedisTemplate.opsForValue();
        operations.getOperations().delete(token);
        return Result.success();
    }

}
